SOIL CHARACTERISTICS AND SHEAR WAVE VELOCITY STUDY IN NORTH SULAWESI, GORONTALO AND CENTRAL SULAWESI

Authors

  • Ahmad Naufal Fadhil Pertamina University
  • Iktri Madrinovella Pertamina University
  • Bayu Pranata Badan Meteorologi, Klimatologi, dan Geofisika
  • Elisabet Anggun Pramesthi Badan Meteorologi, Klimatologi, dan Geofisika

Keywords:

Sulawesi, Earthquake, HVSR, Dominant frequency, Amplification factor, Soil vulnerability index, Vs30

Abstract

The Sulawesi region has a high level of earthquake vulnerability because it is bounded by two major plates, the Eurasian plate and the Indo-Australian plate, which leads to several paths and faults scattered throughout the region, including the volcanoes in North Sulawesi Province, the Gorontalo fault in Gorontalo Province, and the Palu-Koro fault in Central Sulawesi Province. In North Sulawesi, Gorontalo, and Central Sulawesi, soil characteristics were studied utilizing the Horizontal and Vertical Spectral Ratio (HVSR) approach. The dominant frequency (f0), the amplification factor (A0), the seismic vulnerability index (Kg), and the shear wave velocity at a depth of 30 m (Vs30) were all measured in this study. According to the findings of this study, the distribution of dominant frequency values ranged from 0.6 to 17 Hz, the amplification factor ranged from 2.2 to 8.4, the seismic vulnerability index ranged from 0.2 to 41, and the shear wave velocity at the depth of 30 meters (Vs30) ranged from 226 to 519 m/s.

Downloads

Published

29-02-2024

Issue

Vol. 2 No. 01 (2024): SUBSURFACE

Section

Articles

License

Copyright (c) 2024 SUBSURFACE

Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.

Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)

This is a human-readable summary of (and not a substitute for) the license.

You are free to:

  • Share — copy and redistribute the material in any medium or format
  • Adapt — remix, transform, and build upon the material

The licensor cannot revoke these freedoms as long as you follow the license terms.

Under the following terms:

Attribution — You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.

  • NonCommercial — You may not use the material for commercial purposes.
  • ShareAlike — If you remix, transform, or build upon the material, you must distribute your contributions under the same license as the original.
  • No additional restrictions — You may not apply legal terms or technological measures that legally restrict others from doing anything the license permits.

Notices:

  • You do not have to comply with the license for elements of the material in the public domain or where your use is permitted by an applicable exception or limitation.
  • No warranties are given. The license may not give you all of the permissions necessary for your intended use. For example, other rights such as publicity, privacy, or moral rights may limit how you use the material.